Plotting Quantities with Astropy

Astropy
1

Using this example from the Astropy documentation:
https://docs.astropy.org/en/stable/visualization/matplotlib_integration.html#plotting-quantities
if I modify the quantity specification so that it is specified like this:
plt.plot([1* u.m, 2* u.m, 3* u.m] )
rather than this:
plt.plot([1, 2, 3] * u.m)
I get a unit conversion error. Any idea how I can get this to work? (My real data is like the former rather than the latter.)

2

Assuming that your quantities are all the same type of unit (e.g., length), you can instantiate a single Quantity object with your array, e.g.,:

plt.plot(u.Quantity([1* u.m, 2* u.m, 3* u.m]))

Hope that helps!

1 Like
3

Thanks, that worked!